Sanding attachment for wood-turning lathes.



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H C A T T A .HU N I D N A S APPLIGATION EILED'Nov.ze,1soe.

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No. 863,228. 'PATENTBD AUG.13, 1907.

M. LSHERIDAN. l SANDING ATTACHMENT PoR woon yTURNING LATHES.

APPLIUATION FILED Komm-.1906.

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N0. 863,228. PATBNTED AUG. 13, 1907.

' M. H. SHERIDAN.

SANDING ATTACHMENT FOR WOOD TURNING LATHBS.

APPLIOATION FILED NOV. 26, 1906.

3 SHEETS-SHEET 3.

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UNITED sTATEs PATENT OFFICE.

MICHELE H. SHERIDAN, OF KENOSHA, WISCONSIN, ASSIGNOR OF ONE-THIRD TO M ATHIAS J. SGHOLEY.

SANDIN G ATTACHMENT FOR WOOD-TURNIN G LATI-IES..

Specification of Letters Patent.

Patented Aug. 13, 1907.

Application filed November 25.1906. Serial No. 345,113.

To all whom 'it may concern:

Be it known that I, MICHELE H. SHERIDAN, a citizen of the United States, residing at Kenosha, in the county of Kenosha and State of Wisconsin, have invented certain new and useful Improvements in Sand Attachments for Wood-Turning Lathes, of which the following is a specification.

lThis invention relates to certain new and useful improvements in wood working machinery, particularly automatic lathes, and the object of the invention is to provide a sanding attachment for wood lathes for the purpose of sanding the article being worked in the machine, at the same time it is being cut out or turned up. By my invention, as the knife automatically cuts out or turns up a table leg or any such article, my improved sanding attachment will automatically follow the knife immediately and will automatically move into and out of and accurately follow all hollow places and protuberances, and enter every curve or recess formed by the knife, being in contact with the leg or other article being made, and sandpapering the same without the necessity of a special machine for that purpose, or extra hands for running it. It is thus to be seen that my invention contemplates economies in the wood working art. f With this and other objects in view as will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts, hereinafter described and particularly pointed out in the appended claims.

For a full description of the invention and the meiits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result, reference is to be had to the following description and accompanying drawings in which:

Figure l is a perspective view of my improved sanding attachment applied to an automatic lathe; Fig. 2 is a transverse sectional view through the bed of the lathe, all parts unnecessary to the understanding of the invention being omitted, and the sanding attachment being shown in side elevation; Fig. 3 embodies two views of the form plate employed, it being understood that the design described by the margin of said plate is merely arbitrary; Fig. 4 is a detail perspective view of the' bracket for supporting the rotary brush employed, and its concomitant parts; Fig. 5 is a horizontal sectional view taken through the arm of the bracket, the brush being shown in elevation or top plan; Fig. 6 is a front elevation, illustrating the brush and its relation to the supporting arms for two of the pulleys or idlers for the sanding belt; and Fig. 7` is a detail peispective view of the said supporting arms, the brush supporting shaft andits boXings, and the .outer forked end of the arm which carries the said boxings, the said shaft, and the said arms.

Referring to the drawings, the numeral l designates the bed of an automatic lathe, and 2 designates the carriage which is caused to travel lengthwise of the machine by means of a feed screw or worm 3. The carriage is intended to support at its foremost end the forming knives which shape out the wood, and at its rear end the said carriage supports a bracket 4 which is bolted thereto, the bolt working through slots 5 in the base of the bracket so that the bracket may be adjusted whenever desired, with respect to the bed of the machine.

The bracket 4 is provided with two laterally extending arms 9, one above the other and provided at their outer ends with sleeves forming bearings for a vertical tension shaft l0. The shaft l0 is provided with a collar l1, and a coil spring l2 surrounds said shaft below the collar and bears against the latter and also against the lower bearing formed by the lowermost arm 9. The tension of the spring is to move the shaft l0 upwardly. The shaft 10 carries at its upper end a fianged pulley or roller 13, and the bracket 4, preferably at the bases of the arms 9, carries flanged pulleys or rollers 14 in bearings 14C. The rollers 14 are preferably covered with felt or some similar soft fabric.

16 designates the sanding belt which is an endless strip, preferably of canvas or similar textile fabric coated with sand on one side and passing over the I pulley 13 and around the pulleys 14, and thence around the upper and lower pulleys l5 mounted between the upper and lower ends of two vertically extending spaced apart supporting arms 7. The said strip also passes around a flanged pulley 17 carried at the lower end of a bracket 18. The pulley 17 is underneath and in vertical alinement with the pulley 13, and is relatively stationary with respect to its bearings, while the pulley 13 being mounted on the spring pressed sha-ft 10, maintains the sanding belt always under proper tension.

The arms 7 which carry the pulleys l5 at their upper and lower ends, are provided intermediate of their ends with polygonal or noncircular openings 7a designed to receive the correspondingly shaped boxings 8. The boxings 8 are mounted to slide, but are held from rotating in horizontally elongated slots 6a in the members 6b of the outer forked end of an arm G, which extends laterally from the bracket 4 at a point intermediate of the upper and lower forked ends of said bracket. The boxings 8 are formed with circular bores in which a shaft 8'l is mounted, and the ends of said shaft project through vand beyond the boxings and arms as shown. A brush 20 is mounted on the shaft Sa between the boxings 8 and the forked members 6b, and the periphery of the brush preferably projects beyond the peripheries of the upper and lower rollers 15 between which the brush is located, and with which it is in vertical alinement. By the arrangement of square or noncircular boxings 8 and their engagement as described, with the supporting arms 7, it is manifest that the boxings 8 slide back and forth in the slots (iu to carry the brush and the rollers 15 inwardly or outwardly, the arms 7 will always be held in a true vertical position and movement is imparted to the two pulleys both back and forth the same as is imparted to the brush. As best seen in Fig. 2, the brush 20 is intended to press the sanding belt 16 against the article to be sanded, and by the arrangement described the brush will always be kept in the same relative position with respect to the belt throughout the entire sanding operation of any article being produced.

The sanding belt 16 is caused to travel around the several rollers described by an actuating means'which will be hereinafter set forth, and it is pressed into the crevices of the work and always against the same by means of the rotary brush 20, ln order to cause the i brush and that portion of the belt against which it presses to follow the curves, Crcvices, and other outline of the article being shaped, so as to sand the same, l provide a lever 23 which is fulcrumed intermediate of its ends on the bracket 4 to swing in a vertical plane,

the ulerum point being indicated at 24. The upper end of the lever 23 is forked as indicated at 23L and its forked members embrace the two upright supporting arms 7, and are provided at their extremities with vertical slots 23, which receive the outwardly projecting ends of the shaft 8. The lower endof the lever 23 projects laterally, and is provided with a box or socket 230, in which a linger 26 is removably secured, as by a set screw, or the like. lt is evident that when the lever 23 is rocked its upper forked end will move the shaft 8^L outwardly or inwardly, and thereby impart the corresponding movement to the rotary brush 20 and the two rollers 15. In order to rock the said lever, so as to cause its upper end to move the brush with pressure against the inner side of the traveling sanding belt, in order to press the same against the work, 1 provide a form plate 25 which is angular in cross-section as shown in Figs. 2 and 3, and which is secured to the bed 1 with one member extending upwardly and the other inwardly in a horizontal plane towards the laterally extending lower end of the lever 23. The upper edge of the form plate 25 is formed with a scroll, which is exactly the same as the scroll inten ded to be wrought on a piece of wood, while the scroll on the opposite edge of the form plate is exactly the opposite, and is intended to control the movement of the lever 23 and the consequent movement of the brush 20. r1`he last named edge of the form plate is engaged by the knifeedge tracer 26 before mentioned, and this tracer slides along the scroll edge of the horizontal member of the form plate 25 and thereby rocks the lever back and forth, so as to always carry the brush 20 in a direction to press the traveling sanding belt against the work being operated upon.

As has been before stated, the bracket l and its concomitant parts are carried by the carriage 2 which also carries the shaping knife and which is fed along the bed of the machine by means of the feed screw or worm 3. In ord er to provide for the movement of the traveling belt 16, l secure the bracket 18 to-the carriage 2 and mount in the upper end of said bracket a worm gear 527 which meshes with the worm 3 preferably on the lower side of the same. On the same shaft as the worm gear 27 there is a bevel pinion 28 meshing with a sirnilarpinion 29 held on the upper end of a vertical shaft 30 which is liournaled in the bracket 1S. At its lower end the shaft 3() carries a bevel pinion 31 meshing with a similar pinion 32 on the shaft of the lower pulley 17. Hence as the carriage 2 travels along, the pulley 17 will be rotated to effect the requisite traveling movement of the belt 1G.

From the foregoing description, in connection with the accompanying drawings, it will be seen that l have provided an improved sanding attachment for an automatic wood lathe, which is so arranged upon the carriage for the forming knives, as to immediately follow said knives and automatically sandpaper the article being operated upon without any attention and without the provision of a separate machine or tools for this purpose.

While 1 have described and shown the lower pulley 17 and its actuating means, ing the sanding belt 16, it is obvious that the invention as the mechanism for drivis not limited to this precise arrangement, and that it A is within the purview of the invention to drive the.

being operated upon in the lathe, and means for automatieally pressing said brush against the inner face of the belt whereby to cause the latter' to bear against the article, for the purpose specified. r

2. In a lathe, the combination with the carriage Jfor the shaping knives, of a traveling sanding belt carried by said carriage, means for imparting a movement to said belt in a direction across the article being operated upon in the lathe, a r'evoluble brush mounted adjacent the article and adapted to press the belt against the same, a rocking lever having one of its arms pivotally connected to the axis of said br'ush, and a form plate arranged to control the movements of said lever', as and for the purpose set forth.

3. In a lathe, the combination with the carriage for the shaping knives, of a traveling sanding belt carried by said carriage, means for imparting a movement to said belt in a direction across the article being operated upon in the lathe, a revoluble brush mounted adjacent the article and adapted to press the belt against the same, a rockingl lever having forked arms pivotally connected to the shaft of said brush, a knife edge tracer carried by the other arm of said leverVand a form plate arranged for contact with said knife edge tracer' whereby to control the movements of said lever', as and for the purpose set forth.

4. In a lathe, the combination with the carriage for the shaping knives, and the means for movingthe carriage, of a bracket mounted on the carriage to move therewith, said bracket being provided with a laterally extending ar'm slotted at its outer' end in a horizontal plane, a shaft 'mounted to move back and forth in said slots, a rotary br'ush mounted on said shaft, arms also carried by said shaft, upper and lower rollers or pulleys carried by said arms and in alnement with the brush, means for' maintaining the said arms in a vertical position as they are carried back and forth by the shaft, a sanding belt adapted to pass around said pulleys and across the brush, means for impartinga movement to said belt, and means for automatically carrying the shaft outwardly so as to press the sanding belt against the work being operated upon.

5. 1n a lathe, the combination of a carriage for the shaping knives and means for moving the same, of a bracket mounted on said carriage Aand movable therewith, said bracket being provided with a laterally extending arm forked at its outer end and the extremities of said fork being provided with horizontal slots, boxings mounted to slide back and forth in said slots the boxing-s, a shaft mounted to turn in said boxings with beyond the same, a pair of supporting arms rigidly secured to the boxings, upper and lower pulleys carried by said arms, a brush mounted on said shaft between the arms and between the pulleys, a lever provided with an upper forked end the 'extremities of which are vertically slotted and receive the projecting ends of belt mounted to travel around said pulleys and across the brush, means for imparting a travbelt, and means for automatically rocking the lever as and for the purpose set forth.

6. In a lathe, the combination with the carriage for the shaping knives, of a bracket mounted on said carriage and mounted to move vertically in said arms and carrying a pulley at its upper end, upper and lower rollers 14 journaled in said bracket at the bases of the said rearwardly extending arms, a pulley journaled below the carriage and carried thereby, a sanding belt mounted to travel over said pulley, the pulley at the upper end of the tension ends of said arms and over which the sanding belt extends, a brush mounted between said arms and between the pulleys carried thereby and adapted to press against the rear tace of the belt as it travels across the brush, a lever fulcrumed intermediate of its ends on the bracket, with its upper end operatively connected to the brush to move the same bodily against the rear face of the sanding belt, and a form plate arranged to control the movements of said lever.

In testimony whereof I aflx my signature in presence of two witnesses.

MICHELE IVI. SHERIDAN. [n s.] Witnesses:

M. J. SCHOLEY, PETER MowRILL. 

